1. Add one tablespoon of coffee to 8 mugs; add plenty of milk to make it weak (it won't taste nice if it's too strong!)2. Put the coffee in the fridge for around 30 minutes to cool.3. Melt the plain chocolate.4. Add the melted chocolate, ice cream, coffee, ice cubes and the remaining milk into a blender and blend until smooth.5. Serve in tall glasses with extra chocolate, ice and whipped cream to serve (optional).